// Initialize a new Pikko instance with width and height set to 300, and initialized to blue.
let pikko = Pikko(dimension: 300, setToColor: .blue)

// Set the PikkoDelegate to get notified on new color changes.
pikko.delegate = self

// Set Pikko center and add it to the main view.
pikko.center = self.view.center
self.view.addSubview(pikko)

// Getting Pikko color.
let color = pikko.getColor()

// Setting Pikko to a specific color.
pikko.setColor(.blue)

// Initialize a new Pikko instance.
let pikko = Pikko(dimension: 300, setToColor: .purple)

// Set the PikkoDelegate to get notified on new color changes.
pikko.delegate = self

// Set Pikko center and add it to the main view.
self.view.addSubview(pikko)

// Get the current color.
_ = pikko.getColor()

// Set autoconstraints.
pikko.translatesAutoresizingMaskIntoConstraints = false
pikko.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
pikko.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: -200).isActive = true

@IBOutlet weak var PikkoView: Pikko!

/// If you add Pikko via interface builder and you want to set
/// a color on your picker or set the delegate, make sure to 
/// call it from this method, NOT the viewDidLoad.
override func viewDidAppear(_ animated: Bool) {
    PikkoView.delegate = self
    PikkoView.setColor(.purple)
}

class ViewController: UIViewController, PikkoDelegate {
...

// Delegate method that lets you get updates on the currently
// selected color.
func writeBackColor(color: UIColor) {
    // TODO: Handle received color. 
}